[MARMAM] new article on stranding interpretation

Hélène Peltier hpeltier at univ-lr.fr
Mon Aug 10 04:24:22 PDT 2015


Dear colleagues,
We are glad to inform you that following article was recently published 
in Environmental Science and Policy.

Peltier & Ridoux, 2015. MARINE MEGAVERTEBRATES ADRIFT: A FRAMEWORK FOR THE INTERPRETATION OF STRANDING DATA IN PERSPECTIVE OF THE EUROPEAN MARINE STRATEGY FRAMEWORK DIRECTIVE AND OTHER REGIONAL AGREEMENTS.

Abstract:
  
For many species of marine megafauna, strandings remain the most important source of biological
samples. Because of their opportunistic nature however, strandings data have long been under- or
misused in the assessment of population conservation status. Even if many national and international
regulations promote the use of strandings in monitoring strategies, the interpretation of strandings
remains controversial. The aim of this study is to provide a context for the interpretation of marine
megafauna stranding data, in order to assess the achievement of specific objectives against Good
Environmental Status criteria in the context of the EU Marine Strategy Framework Directive or other
regional agreements. The first step is to construct an a priori spatial distribution under a null hypothesis
H0. The a priori spatial distribution of theoretical dead animals can either be set uniformly, consistent
with current knowledge on abundance of marine vertebrates, or based on management objectives. The
drift prediction of these theoretical carcasses would provide a time series of strandings expected under
the null hypothesis. The reverse drift of observed strandings would highlight mortality areas of stranded
animals. The correction of these areas by the probability of getting stranded according to drift conditions
would provide an estimated distribution of dead animals inferred from strandings. The differences
between expected and observed situations constitute anomalies and highlight cases where inferred
distribution departs from the a priori spatial distribution. This work proposes several population
indicators that can be used anywhere in the world and can be applied for all large marine vertebrates
found stranded. The integration of these indicators in MSFD and various regional agreements could
provide cost-effective and relevant information on protected species. In the context of impaired
ecological situations, the complementary use of several population indicators could strengthen the
diagnosis made regarding conservation status and hence conservation strategies.
		
	
	
King regards,
Helene Peltier
		


Marine megavertebrates adrift: A framework for the interpretation of stranding data in perspective of the European Marine Strategy Framework Directive and other regional agreements

-- 
Helene PELTIER, phD
Observatoire PELAGIS, UMS 3462 CNRS/Université La Rochelle
5 allées de l'océan
17000 LA ROCHELLE, FRANCE
office:     +33 5 16 49 67 82
cell phone: +33 6 82 74 08 41

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